Skip the auto shop - Our mechanics make house calls

Q: My car will not start without a jump

asked by on

My car drove to work fine, I went to start it when I left and it wouldn't start, I figured I left a light on or something and I got a jump and it started, while I was driving it my stereo was going in and out and my check engine, abs, battery, and airbag lights all came on. When I got home and turned off my car it would not start again. I had to get a jump and all the lights came back on, now my car is making a whistling sound and my cat was silent before, why is it doing all of this suddenly?

My car has 133751 miles.
My car has an automatic transmission.

This sounds like your alternator is going out. It maybe outputting just enough power to allow the car to run once you get it started, but it isn’t putting out enough power to recharge your battery. Either way, you need to have the battery tested first followed by your alternator. The whistling sound is most likely the alternator. They will often make various humming or whistling noises when problems occur.

Based on your description, it is likely your alternator. Although, the battery could be the source of the problem for detailed reasons beyond the scope of this forum. For this reason, the battery should be thoroughly tested before the alternator is condemned.

If you need help with getting these components checked, consider YourMechanic. A certified technician will be able to assist you by diagnosing the issue with your battery and fix it as necessary

Good luck!

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car will not start without a jump

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 2004 Toyota Solara won't start

This is going to be due to a bad starter. Have a mechanic check the cables to the starter first and then see if the starter is getting the proper voltage. The starter then should be replaced if you need...

Q: What Does the Accessory Belt on the Front of an Engine Do?

The accessory belt is used to turn any accessory by the crankshaft of the engine any time the engine is running, without having a direct mechanical connection. The belt is used by the engine to turn all the accessories at...

Q: Car steering locked in intersection

Hello there, this sounds like an rare situation. The whistling sound with the Check Engine Light would have a few possible symptoms. Most likely there would be an exhaust leak or a vacuum leak. Either could also set the Check...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.